Bulletin of the American Physical Society
APS April Meeting 2018
Volume 63, Number 4
Saturday–Tuesday, April 14–17, 2018; Columbus, Ohio
Session K08: Neutrino Cross Sections |
Hide Abstracts |
Sponsoring Units: DPF Chair: Luke Corwin, South Dakota School of Mines and Technology Room: A110 |
Sunday, April 15, 2018 3:30PM - 3:42PM |
K08.00001: Improvements in the NuMI Flux Prediction at MINERvA. Dipak Rimal MINERvA uses its state-of-the art infrastructure to predict neutrino flux from Fermilab's NuMI beamline. The infrastructure incorporates world knowledge of the hadron production and interaction measurements to normalize the hadron production predicted by GEANT4.The predicted spectrum for the NuMI on-axis flux for low recoil events in the Medium Energy (ME) beam appears to be shifted by a fraction of a GeV. Since the cross section for low recoil events is nearly independent of the incoming neutrino energy, a discrepancy in the shape of the low recoil spectrum suggests a problem with flux prediction rather than a cross-section problem. A similar discrepancy is seen in the antineutrino beam and by MINOS$+$, and is not seen in a data set where the horns are turned off. This suggests that it is a focusing rather than a hadron production mismodeling. In order to produce a more accurate flux prediction, MINERvA has developed a strategy to fit the neutrino data-simulation discrepancy for a number of possible focusing system effects: alignment, horn current, and primary beam parameters. The fit takes into account the fact that different alignment offsets will affect neutrino energy spectra differently in various transverse regions of the MINERvA detector. This talk will focus on different aspects of this flux fit and the systematic effects. [Preview Abstract] |
Sunday, April 15, 2018 3:42PM - 3:54PM |
K08.00002: Preliminary Results in MINERvA's Nuclear Targets for CCQE-like Events Jeffrey Kleykamp MINERvA is a precision cross section experiment for neutrino scattering processes on various nuclei.~ Charged-Current Quasi-Elastic (CCQE) cross sections are relevant for neutrino oscillation experiments such as T2K, NOvA and DUNE.~ This talk describes how MINERvA's nuclear targets are used to measure the scaling in CCQE-like event rates as function of target nucleus. CCQE-like is defined as events with no detected pion.~ Preliminary results are shown for rates of CCQE-like events produced in the MINERvA medium energy run on carbon, hydrocarbon, iron, and lead targets.~ The presented data are analyzed in terms of muon variables, proton variables and variables that combine information from muons and proton. [Preview Abstract] |
Sunday, April 15, 2018 3:54PM - 4:06PM |
K08.00003: Current Status of the Inclusive Neutral Current $\pi^{0}$ Production Cross section Measurement with the NOvA Near Detector Daisy Kalra The NOvA (NuMI Off-axis $\nu_{e}$ Appearance) experiment is designed to study long-baseline neutrino oscillations. It uses two detectors, the NOvA near detector (ND) at Fermilab and the NOvA far detector (FD) at a distance 810 km in northern Minnesota. NOvA measures the rate of $\nu_{e}$ appearance at the FD using a narrow-band $\nu_{\mu}$ beam peaked at 2 GeV in energy. Neutral Current (NC) interactions with a $\pi^{0}$ in the final state are a significant background in the $\nu_{e}$ appearance measurement. The $\pi^{0}$ decay into two photons can fake the $\nu_{e}$ appearance signal either due to merging of two photon showers or one of the two photons escaping the detection. Therefore, a complete understanding of NC interactions with $\pi^{0}$ in the final state is very important. It will also help in reducing the background uncertainties for current and future long-baseline neutrino oscillation experiments. We present the status of the analysis related to the inclusive NC $\pi^{0}$ production cross section measurement with the NOvA ND. A multivariate event identification algorithm is used to select the NC $\pi^{0}$ events of interest and the selection criteria are optimized by minimizing the fractional uncertainty on the total cross section. [Preview Abstract] |
Sunday, April 15, 2018 4:06PM - 4:18PM |
K08.00004: Status of the inclusive electron neutrino charged-current cross-section measurement in the NOvA near detector Matthew Judah, Leonidas Aliaga, Pengfei Ding The inclusive electron neutrino charged-current (CC) cross-section on nuclei is an important input parameter to appearance neutrino oscillation measurements. There are a small number of measurements of this cross-section in the few-GeV region where current and future long baseline neutrino experiments operate. This analysis uses an event identification technique inspired by visual deep learning tools. We present the current status and techniques being used on the NOvA experiment for the inclusive CC measurement in few-GeV electron neutrino interactions. This measurement looks to produce the single differential cross sections versus electron angle and energy, as well as the total cross section versus neutrino energy. [Preview Abstract] |
Sunday, April 15, 2018 4:18PM - 4:30PM |
K08.00005: Status of the $\nu_\mu$ CC inclusive cross section measurement in the NOvA near detector Shih-Kai Lin, Leonidas Aliaga, Biswaranjan Behera, Kanika Sachdev The NOvA (NuMI Off-axis $\nu_e$ Appearance) experiment is a neutrino oscillation experiment hosted by Fermilab. The primary goal is to measure neutrino oscillation parameters by observing electron neutrino appearance and muon neutrino disappearance in the NuMI beamline. NOvA deployed two functionally identical detectors along the beamline, each of which is a segmented tracking calorimeter. A far detector 810 km away from the target in Ash River, MN, is used to observe the oscillated neutrino spectra, and a near detector underground at Fermilab is used to observe the unoscillated spectra. Cross section measurements are also carried out utilizing the high rate of neutrino interactions in the near detector. In this talk, the status of the $\nu_\mu$ CC inclusive cross section measurement with $8\times 10^{20}$ proton on target (POT) of data is presented. The cross section is measured as a function of total neutrino energy and as a double differential with respect to the muon kinetic energy and cosine of the angle with respect to the neutrino beam. The purity and efficiency of the event selection, and the assessment of systematic uncertainties pertinent to this measurement are detailed. [Preview Abstract] |
Sunday, April 15, 2018 4:30PM - 4:42PM |
K08.00006: Neutrino charged current pionless cross section measurements at the NOvA Near Detector Leonidas Aliaga Soplin NOvA is a long-baseline two-detector experiment designed to study neutrino oscillation parameters using the NuMI beamline. The NOvA near detector, located at Fermilab, provides an excellent opportunity to measure neutrino interaction cross sections with high statistics, which will benefit current and future neutrino programs. In this talk, we present the status of the charged-current muon-neutrino measurement with zero-pions in the final state. This channel is important to understand the nuclear effects and discriminate between different models by having the quasi-elastic topology but also including inelastic processes where pions were absorbed before exiting the nucleus. [Preview Abstract] |
Sunday, April 15, 2018 4:42PM - 4:54PM |
K08.00007: Event Reconstruction Efficiency and Purity Studies for Charged Pion Semi-Inclusive Neutrino Charged-Current Cross Section in NOvA Jyoti Tripathi The NOvA experiment is a long-baseline neutrino oscillation experiment designed to measure the rates of electron neutrino appearance and muon neutrino disappearance. The NOvA near detector is located at Fermilab, 800~m from the primary target and provides an excellent platform to measure and study neutrino nucleus interactions.We present the status of the measurement of the differential cross section with respect to pion kinematics for interactions involving charged pions in the final state, $\nu_\mu N \rightarrow \mu^{\minus} \pi^\mp X$.We are using a convolutional neural network-based approach for the identification of particles produced in neutrino-nucleus interactions. We present event classification efficiency and purity studies using this particle identification, along with systematic uncertainties on the final selection, background estimates and prospects for the measurement. [Preview Abstract] |
Sunday, April 15, 2018 4:54PM - 5:06PM |
K08.00008: ABSTRACT WITHDRAWN |
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700